Third Symposium on Prediction of the Madden–Julian Oscillation: Processes, Prediction, and Impact, sponsored by the American Meteorological Society, will bring together scientists, forecasters, and end-users from the academic, operational, and private sectors worldwide to improve our understanding and forecasting of the MJO and their applications to benefiting the society. Joint sessions are planned with the Sixth Conference on Weather, Climate, and the New Energy Economy.